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Question

In the circuit diagram, the current flowing through the 2 ohm resistor is 1 ampere. Then the current flowing through the other resistors will be


A

2 A and 0.5 A

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B

1 A and 2 A

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C

2 A and 4 A

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D

1 A and 0.5 A

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Solution

The correct option is A

2 A and 0.5 A


Current through 2 ohm is 1 ampere

Thus, from ohm’s law, V = IR, voltage across 2 ohm is

V = 1 × 2 = 2 V

Here the three resistors are connected in parallel

When a number of resistors are connected in parallel, then the potential difference across each resistance is the same.

Thus, current through 1 ohm resistor = 2/1 = 2 A

Current through 4 ohm resistor = 2/4 = 0.5 A


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